Abstract
It was recognized experimentally in a vertical moving bed that a radial normal stress acting on an element in the bed began to increase in intensity with radial distance from near the edge of plug flow region (constant velocity region) into a vertical wall, developed into a maximum value on the wall, and that the radial distribution of vertical velocity showed a great reduction in velocity only near the wall although a velocity was gradually reduced apart form the wall.
On the other hand, the radial normal stresses in the plug flow region and on the wall and radial distribution of vertical velocity were respectively predicted on the basis of plasticity theory in which stress and velocity characteristics coinside, and compared with experimentally determined characteristics. As a result of it, it was concluded that each radial normal stresses computed by theory reasonably agreed with experimental ones, and that the existance of discontinuity of vertical velocity at a position in radial distance was predicted by theory and experimentally determined velocity field could be interpretted as discontinuity.
